Oh, this has been discussed before.
One website actually says that it’s the “inherent vibrations of the carbonyl bond that mixes the gasoline.”
oh, this:
http://www.pureenergysystems.com/news/2005/03/17/6900069_Acetone/
and the “ideal” automotive fuel is 2,2,4-trimethylpentane, so I don’t know how seriously I take them.